MLA

Savoy Hours. 0AD. https://collections.library.yale.edu/catalog/2002815.

APA, 6th edition

Savoy hours. (0 C.E.). [Prayers and devotions, Manuscripts, Medieval France 14th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2002815.